13. Don’t speed up your Salah and pay attention to what you are doing in the Salah.

14. Remember that Allah (SWT) responds to your Salah. As long as you are paying attention to your Salah, Allah is paying attention to it, but when your heart turns away from the Salah, Allah (SWT) has no need to listen to your dua.

15. Pray with a Sutra and draw near to it. If someone tries to pass in front of you, put your hand out to stop them so that they don’t cross in front of you to break your concentration.

16. Seek refuge from the Shaytan when you go for your Salah. If you are distracted by thoughts in your Salah, then turn to your left side with your head and spit thrice with dry spittle and say “audhubillahi minash Shaytan arRajeem.”

17. Pray as if it is your last prayer. Say to yourself, “I’ll never be able to pray another prayer after this.”

For more information on the importance of Khushoo, check out Muhammad Al-Shareef’s Salah Mastery lecture:

Part 1:

Part 2:

Part 3:

Also, just found this and thought it would be helpful to add:

Al-Ḥātim b. ‘Āṣim (raḥimahullāh) was one of the tabi‘īn. He was asked, “How do you attain tranquility in your prayer? We see you so engulfed. How do you reach that level?” He said, “Before I start, I imagine the ṣirāṭ (bridge over Hellfire) in front of me. I imagine Jannah is on my right and Hellfire is on my left. I remember that the one who does not pray his ṣalawāt in this world will be grabbed by a hook on the ṣirāṭ and have to make them up in Jahannam. Then I imagine the angel of death is standing behind me, and I don’t know when he is going to attack. Then I imagine that the Prophet (ṣallallāhu ‘alayhi wa sallam) is standing in front of me to monitor the correctness of my ṣalāh. Then I remember that Allāh, Who created all of that, is monitoring me. Then I start.”